Death at Broadcasting House
1934
The authors were two men who worked for the BBC, Val Gielgud, brother of John, and Eric Maschwitz, who used the pen-name Holt Marvell. Of the two, Gielgud was the great enthusiast for the genre. He was a good friend of Dorothy L. Sayers and John Dickson Carr, and ultimately earned election to the Detection Club. This early effort, however, is perhaps his most famous.
Val Henry Gielgud (28 April 1900 – 30 November 1981) was an English actor, writer, director and broadcaster. He was a pioneer of radio drama for the BBC, and also directed the first ever drama to be produced in the newer medium of television. ... adapting his thriller Death at Broadcasting House, in which he also appeared.